Multifocal synchronous angiomyolipomas in a kidney and lungs

Angiomyolipoma (AML) is a benign tumor composed of vascular, adipose, and muscle tissues. AML commonly occurs in the kidneys, and is associated with tuberous sclerosis. Different sizes of AML have been reported in the literature. In general, a giant or huge AML usually refers to a tumor size greater than 10 cm in diameter. Several studies have suggested that a giant AML is associated with an increased risk of complications. Herein, we report a case of a giant AML in a 56-year-old patient with abdominal bloating for 6 months. Ultrasound and computed tomography examinations revealed a giant renal AML as well as multiple pulmonary tumors, and thus the patient was scheduled for nephrectomy and pulmonary wedge resection. The resected mass measured 24.6 × 18.4 × 27.3 cm. This report also reviews all previously described cases of large AMLs.